diff --git a/binaryGap.php b/binaryGap.php
index b380278..ccbe49d 100644
--- a/binaryGap.php
+++ b/binaryGap.php
@@ -3,6 +3,7 @@
 function solution($n){
 	//Get the binary nof the number
 	$bnry = decbin($n);
+	//trim  zero from both sides
 	$bnry=trim($bnry, "0");
 	//Explode string by 1-s
 	//Compare the length of each